61767224838 has 64 divisors (see below), whose sum is σ = 149921856000. Its totient is φ = 18694450080.

The previous prime is 61767224837. The next prime is 61767224843. The reversal of 61767224838 is 83842276716.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61767224837) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 425688 + ... + 552036.

It is an arithmetic number, because the mean of its divisors is an integer number (2342529000).

Almost surely, 2^61767224838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61767224838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74960928000).

61767224838 is an abundant number, since it is smaller than the sum of its proper divisors (88154631162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61767224838 is a wasteful number, since it uses less digits than its factorization.

61767224838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127194 (or 127188 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 54.

The spelling of 61767224838 in words is "sixty-one billion, seven hundred sixty-seven million, two hundred twenty-four thousand, eight hundred thirty-eight".